5G Network Test Engineer

Persistent Systems; Bengaluru; On-site; INR 1,200,000 - 1,800,000; Full time

Benefits offered by this job

Competitive salary

Comprehensive insurance coverage

Flexible work hours

Quarterly growth opportunities

Company-sponsored education programs

Job summary

A leading technology solutions provider in Bengaluru is seeking a highly skilled Senior 5G Network Level Test Engineer. The role involves validating 5G systems, analyzing call flows, and developing test automation using Python and AI tools. Candidates should have a strong understanding of 3GPP standards, detailed experience in RAN protocols, and be capable of managing lab setups. The company offers a competitive salary, comprehensive benefits, and a culture that emphasizes talent development and inclusivity.

Qualifications

• 6 to 12 years of experience in 5G testing.
• Proven experience with 3GPP Rel-15/16/17 specifications.
• Expertise in network performance analysis and debugging.

Responsibilities

• Validate 5G RAN Systems End-to-End.
• Analyze & Debug Protocol Layers using advanced tools.
• Develop Test Automation using Python and frameworks.
• Manage End-to-End Lab Setup for testing environments.
• Collaborate with Cross-Functional Teams for project success.

Skills

E2E system testing

RAN protocols

AI-driven automation

4G/5G protocol analysis

Python

Robot Framework

Wireshark

Education

Bachelor's degree in Engineering or related field

Tools

Wireshark

QXDM

Robot Framework

Scapy

Job description

We are seeking a highly skilled Senior 5G Network Level Test Engineer who can seamlessly bridge 3GPP standardization theory with real-world network implementation. This role demands strong expertise in E2E system testing, RAN protocols, and AI-driven automation. You will validate 5G Small Cell systems against 3GPP Rel-15/16/17 specifications, debug complex call flows, and ensure robust performance across gNB, UE, and Core Network interfaces.

• Experience: 6 to 12 Years
• Job Type: Full Time Employment

What You'll Do:

• Validate 5G RAN Systems End-to-End:
• Execute standards-driven E2E test plans on real gNB, Small Cell, and Femto Gateway hardware, ensuring full compliance with 3GPP Rel‑15/16/17 specifications and IETF RFCs.
• Analyze & Debug Protocol Layers:
• Investigate L2/L3 signaling using Wireshark, QXDM, QCAT, and XCAL/XCAP; perform ASN.1 decoding to identify deviations, failures, and bottlenecks in call flows, mobility, security, and throughput.
• Own Root Cause Analysis:
• Perform deep‑dive debugging for issues such as NG/S1 setup failures, RLC/MAC throughput degradation, handover failures, EPS Fallback issues, VoNR call drops, and SeGW tunnel establishment problems.
• Validate advanced 5G features including ENDC (NSA), SA Option‑2, CBRS (SAS/DP interactions), VoNR, Mobility Events (A3/A4/A5), and PTP (1588v2) synchronization.
• Develop Test Automation:
• Build and enhance automation using Python, Robot Framework, Pandas-based log analysis, and Scapy for packet manipulation. Reduce manual effort through reusable frameworks and automation workflows.
• Utilize AI Tools for Engineering Efficiency:
• Leverage LLMs to parse large PCAPs, extract IE values, generate regex for log mining, and summarize complex issues from regression cycles.
• Manage End-to-End Lab Setup:
• Configure and maintain cOAM, certificate management for Security Gateway (SeGW), and Core Network simulators (EPC/5GC). Ensure stable, scalable testbed operations.
• Collaborate with Cross‑Functional Teams:
• Work with development, QA, system architects, and deployment teams to drive feature readiness, interoperability, and release quality.

Expertise You'll Bring:

• Deep 3GPP Protocol Knowledge:
• Mastery of 3GPP Rel‑15/16/17 specs including RRC (TS 38.331), NGAP (38.413), XnAP (38.423), and NAS (24.501), along with hands‑on debugging using these standards.
• Advanced RAN & Call Flow Expertise:
• Proven experience with ENDC/SA call processing, Mobility Events (A3/A4/A5), handover algorithms, VoNR, EPS Fallback, CBRS/Domain Proxy interactions, and PTP 1588v2 synchronization.
• Ability to dissect logs across L2/L3, decode ASN.1, and resolve issues involving throughput degradation, signaling failures, and IPsec/SCTP transport challenges.
• Solid experience with Python, Robot Framework, Pandas-based log analysis, Scapy, and Shell scripting to automate protocol-level testing and eliminate manual effort.
• Comfortable using AI/LLMs to analyze PCAPs, generate regex patterns, summarize failures, and build smarter debugging workflows.
• Network Element & Lab Setup Knowledge:
• Experience configuring gNBs, Femto Gateways, SeGW (certificates/IPsec), cOAM systems, and EPC/5GC simulators with full ownership of lab environments.
• Tools Expertise:
• Hands‑on experience with Wireshark (advanced filters/Lua), QXDM, QCAT, XCAP/XCAL, and other protocol trace tools.
• Ability to start from 3GPP documentation, challenge assumptions, and drive feature validation with strong analytical and problem‑solving skills.
• Competitive salary and benefits package
• Culture focused on talent development with quarterly growth opportunities and company-sponsored higher education and certifications
• Opportunity to work with cutting‑edge technologies
• Employee engagement initiatives such as project parties, flexible work hours, and Long Service awards
• Insurance coverage: group term life, personal accident, and Mediclaim hospitalization for self, spouse, two children, and parents

Values‑Driven, People‑Centric & Inclusive Work Environment:

• We support hybrid work and flexible hours to fit diverse lifestyles.
• Our office is accessibility‑friendly, with ergonomic setups and assistive technologies to support employees with physical disabilities.
• If you are a person with disabilities and have specific requirements, please inform us during the application process or at any time during your employment

Let's unleash your full potential at Persistent - persistent.com/careers

"Persistent is an Equal Opportunity Employer and prohibits discrimination and harassment of any kind."